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Medium and low temperature distillation furnace of coal, distillation device based on distillation furnace, and distillation method

A dry distillation furnace and low temperature technology, which is used in dry distillation devices and dry distillation fields, can solve the problems of high tar asphaltene content, low calorific value of dry distillation gas, high water content of semi-coke, and achieve high tar yield and light component content. The effect of many, high calorific value

Active Publication Date: 2013-07-17
SHAANXI COAL & CHEM TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems are that it can only process lump coal with a particle size of 20-80 mm, uneven heating in the furnace leads to slow mass and heat transfer, low tar yield and high tar asphaltenes content, low calorific value of dry distillation gas, high moisture content in semi-coke and low quality

Method used

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  • Medium and low temperature distillation furnace of coal, distillation device based on distillation furnace, and distillation method
  • Medium and low temperature distillation furnace of coal, distillation device based on distillation furnace, and distillation method

Examples

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Effect test

Embodiment 1

[0044] In the above-mentioned low-temperature dry distillation method for coal, raw coal with a particle size of 6-80 mm is used as the dry distillation raw material.

[0045] Operating conditions: the temperature of the drying section is 200-250°C, the temperature of the first dry distillation section is 550-600°C, and the temperature of the second dry distillation section is 700-750°C. Purified gas composition (volume fraction) after condensing recovery purification system: H 2 :46-48%, CO: 10-13%, CO 2 : 10-12%, CH 4 : 20-23%, low calorific value: 4100Kcal / Nm 3 , The yield of tar is 16.8%, and the yield of semi-coke is 55%.

Embodiment 2

[0047] In the above-mentioned low-temperature carbonization method for coal, raw coal with a particle size of 6-80mm is used, and a certain amount of waste plastic is added as the raw material for carbonization.

[0048] Operating conditions: the temperature of the drying section is 200-250°C, the temperature of the first dry distillation section is 550-600°C, and the temperature of the second dry distillation section is 700-750°C. Purified gas composition (volume fraction) after condensing recovery purification system: H 2 :48-50%, CO: 9-11%, CO 2 : 9-13%, CH 4 : 23-24%, average low calorific value: 4500Kcal / Nm 3 . The tar yield is 18.2%, and the semi-coke yield is 58%.

Embodiment 3

[0050] In the above-mentioned medium-low temperature dry distillation method for coal, raw coal with a particle size of 6-80 mm is used, and a certain amount of biomass is added as the dry distillation raw material.

[0051] Operating conditions: the temperature of the drying section is 200-250°C, the temperature of the first dry distillation section is 550-600°C, and the temperature of the second dry distillation section is 700-750°C. Purified gas composition (volume fraction) after condensing recovery purification system: H 2 :47-49%, CO:8-12%, CO 2 : 12-13%, CH 4 : 24-25%, average low calorific value: 4400Kcal / Nm 3 . The tar yield is 18.7%, and the semi-coke yield is 56%.

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Abstract

The invention discloses a medium and low temperature distillation furnace of coal, a distillation device based on the distillation furnace, and a distillation method. The distillation furnace orderly comprises a first cavity, a second cavity and a cooling cavity from top to bottom, wherein the first cavity, the second cavity and the cooling cavity are orderly communicated through a feeding channel; the first cavity is the same as the second cavity in structure; a plurality of heat exchange tube bundles are arranged inside the first cavity and the second cavity; a plurality of drop guides are arranged between adjacent heat exchange tube bundles; the placement direction of the heat exchange tube bundles is vertical to the movement direction of material coal in the cavities; a plurality of heat storage tubes are arranged at the lateral walls of the first cavity and the second cavity; and the first cavity is divided into a drying section and a first distillation section according to difference of temperature.

Description

【Technical field】 [0001] The invention relates to a carbonization device and a carbonization method, in particular to a coal medium-low temperature carbonization furnace, a carbonization device and a carbonization method based on the carbonization furnace. 【Background technique】 [0002] Coal accounts for about 70% of my country's energy consumption structure. In particular, my country's low-rank coal reserves are large, and it has the characteristics of good coal quality, low ash, low sulfur, low phosphorus, and high volatile content, and is an ideal raw material for dry distillation. Coal is dry-distilled at medium and low temperatures to obtain products in three forms: tar, gas and semi-coke. Under the condition of adopting relatively mature and advanced technology, low-rank coal low-temperature dry distillation can obtain at least about 20% of oil and gas and 50% of product semi-coke from raw coal. According to this calculation, about 1.5 billion tons of coal used as f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10B57/10C10B57/14C10B57/02C10B47/02C10B39/00
Inventor 尚建选闵小建郑化安张志刚冉伟利樊英杰苗青陈静升张生军马勇贾培军
Owner SHAANXI COAL & CHEM TECH INST
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